Before anything else, check:

1. Battery voltage — should read approximately 12.5–12.8V.
2. Inline fuse on the thin red wire near the positive battery terminal — look for corrosion, melting, or damage and replace if needed.

A blown or corroded fuse is one of the most common causes of total system failure.

1. Confirm the machine battery is fully charged.
2. Check the inline fuse on the red wire from the positive battery terminal.
3. If the fuse is intact, remove the on/off toggle switch behind the weather shroud. Disconnect the two wires and briefly short them together. If the system powers up, the toggle switch is faulty and needs replacing.

1. Replace the remote battery first (216-9V).
2. Check the radio board — if indicator lights are on, verify the dip switch settings match the remote exactly.
3. If coding is correct, you likely have a stuck relay — common after high humidity or long storage. While holding the remote button, gently tap the black relay with the handle of a screwdriver.
4. If the reel still doesn't activate, the radio unit needs to be returned for diagnosis and repair. Contact our service team via the form below.

This is almost always a stuck relay — particularly common after humidity or extended inactivity.

1. Press the remote button and gently tap the black relay with a screwdriver handle. This may free it temporarily.
2. The relay should be replaced to prevent recurrence. Relays are soldered to the board and are replaceable with standard parts from auto parts stores.

Likely causes include moisture buildup inside the unit, corrosion on fuses or relays, or electrical components degrading during long-term storage.

Prevention: Keep units sealed and dry. Check fuses, relays, and connections before restarting after any extended storage period.

Work through these checks in order:

1. Discharged transmitter battery — replace (216-9V). Replace every 3 months as routine maintenance.
2. Aerial broken or loose on base — replace or tighten. Finger tight only — over-tightening will break the coax cable inside the aerial base and reduce range to as little as 20–40 metres.
3. Coax broken inside aerial base — replace the aerial base and coax cable.
4. Low 12V on machine — charge or replace battery. 12.5V allows optimum performance.
5. Faulty receiver or transmitter — contact our service team for a radio return form.
6. Interference from overhead power lines — relocate the spray system.

1. Engine revs too low — increase to ¾ throttle or approximately 2400 RPM.
2. Drive belts slipping — adjust using the belt tensioner.

White or milky oil means water has entered the oil system through one or more perforated diaphragms. Continuing to use the pump will cause seizure and require full pump replacement. The pump must be fully rebuilt with new diaphragms, O-rings, and seals. Contact our service team for assistance.

Water in the oil glass indicates ruptured pump diaphragms. Running the pump further will seize it. Contact our service team immediately.

In most cases a damaged diaphragm in the pressure controller is the cause. To inspect, remove the four bolts securing the pressure controller and check the diaphragm for tears, perforations, or swelling. Any of these require diaphragm replacement.

If the diaphragm looks intact but pressure is still lost, check for a blocked strainer, air being drawn into the pump, or failed internal pump valves.

1. Regulating valve not set for pressure — set lever (8) to "press" and adjust knob (6).
2. Damaged or worn seat or spring in regulator — replace with Sting repair kit or new spring.
3. Sticking pressure regulator slide — remove slide and lubricate with marine grease.
4. Spray nozzles worn, missing, or exceeding pump capacity — replace with appropriate size.

1. One or more valves not seating — clean or replace valves.
2. Air being drawn through suction line or filter — examine and repair.
3. Air not fully evacuated from pump — run pump with lever (8) on by-pass until all air clears.
4. Blocked suction filter or closed valve — clean filter or open ball valve.
5. Drive belts loose, broken, or direct coupling damaged — tension or replace belts; replace coupling sprockets and chain.
6. Ruptured hoses or fittings — repair or replace.

1. One or more valves not seating — clean or replace valves.
2. Diaphragm split (oil will go milky) — STOP PUMP IMMEDIATELY and replace diaphragm. Refer to pump manual.
3. Air not fully evacuated — run pump on by-pass until clear.
4. Air being drawn through suction line or filter — examine and repair.
5. Oil level low — top up with 20W/30.

1. Damaged or worn seat or spring in regulator — replace.
2. Sticking regulator slide — remove and lubricate with marine grease.
3. Spray nozzles worn, missing, or exceeding pump capacity — replace with appropriate size.
4. Main drive belts slipping — tension or replace; check coupling sprockets and chain.
5. Leaking hoses or fittings — repair or replace.

1. Oil level low — top up with 20W/30.
2. Air in pump or being drawn through suction line — examine and repair.
3. Blocked filter — clean filter.